window.addEventListener('load', () => {
  const canvas = document.getElementById('canvas');

  const gl = canvas.getContext('webgl');
  gl.clearColor(1.0, 0.0, 0.0, 0.5);
  gl.enable(gl.DEPTH_TEST);
});


const myLoadShader = (gl, type, sourceCode) => {
  const shader = gl
};